Treating altitude sickness involves both prevention and response. The most effective preventive strategy is gradual ascent, allowing time for the body to adjust—ideally no more than 300 to 500 metres of elevation gain per day once above 2,500 metres, with a rest day every 3 to 4 days. If symptoms do occur, the primary treatment is to stop ascending and rest at the current altitude until symptoms improve. In mild cases, over-the-counter painkillers such as paracetamol or ibuprofen can help manage headaches, while anti-sickness tablets like promethazine may ease nausea. If symptoms worsen or do not improve after 24 to 48 hours, descent to a lower altitude is necessary. Acetazolamide (Diamox) may be prescribed to speed up acclimatisation and is sometimes used prophylactically. While it’s generally safe for adults, its use in children should be guided by a healthcare professional, typically avoided under the age of 12 unless recommended by a specialist. Oxygen therapy and portable hyperbaric chambers are used in more severe or remote cases.